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使用DNA纳米球进行快速电子定量临床病原体的数字测定

Muhammad Tayyab¹, Donal Barrett², Gijs van Riel²

¹Rutgers, The State University of New Jersey, New Brunswick, NJ, USA.

Science advances

|September 6, 2023

概括

这项研究引入了一种新的,无标签的DNA检测方法,使用同热放大和电阻. 该系统有效地识别核酸,为各种病原体提供快速,廉价和敏感的诊断工具.

科学领域:

生物技术是生物技术.
分子诊断学分子诊断
纳米技术纳米技术

背景情况:

准确的核酸检测对于病原体识别至关重要.
目前的DNA检测方法通常依赖于光或色度测量读数,增加复杂性和成本.
无标签测试是可取的,以降低成本和简化诊断程序.

研究的目的:

开发一种新的,无标签的方法,用于快速准确的核酸检测.
将异热DNA放大与电阻相结合,以实现经济高效的测试.
为各种DNA/RNA目标创建一个紧,低成本和敏感的诊断系统.

主要方法:

使用修改的循环介导同热放大 (LAMP) 开发了一种单同热放大方法.
压缩性寡核酸被用来将增强的DNA目标自组装成纳米球.
用毛细管驱动的流量将纳米球通过微流体阻抗细胞计移动,通过电阻变化进行无标签检测.

主要成果:

该系统使用电阻力成功生成并检测到DNA纳米球.
个别纳米球运动被检测为阻抗的量化变化,提供了清晰的读数.
该方法在检测包括SARS-CoV-2和HIV在内的多种核酸标方面表现出灵活性.

结论:

开发的方法为核酸检测提供了一种新的,无标签的方法.
集成系统是紧的,不需要移动的部件,并利用被动的毛细血管流.
预期的性能包括低成本 (<5美元),高灵敏度 (10个目标副本) 和快速结果 (<1小时),适用于广泛的诊断应用.

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